// JQHTML Parser Error Classes
// Provides helpful error messages with code context
export class JQHTMLParseError extends Error {
    line;
    column;
    endLine;
    endColumn;
    source;
    filename;
    severity = 'error';
    suggestion;
    constructor(message, line, column, source, filename) {
        super(message);
        this.name = 'JQHTMLParseError';
        this.line = line;
        this.column = column;
        this.source = source;
        this.filename = filename;
        // Auto-add suggestions
        this.suggestion = getSuggestion(message);
        // Build the full error message with context
        this.message = this.buildErrorMessage(message);
    }
    buildErrorMessage(message) {
        let result = message;
        // Add location info IMMEDIATELY after message (required for RSpade parsing)
        // Format: "at filename:line:column" (RSpade regex: /at [^:]+:(\d+):(\d+)/i)
        if (this.filename) {
            result += `\nat ${this.filename}:${this.line}:${this.column}`;
        }
        else {
            // Fallback to generic format if no filename
            result += `\nat <unknown>:${this.line}:${this.column}`;
        }
        // Add code snippet if source is available
        if (this.source) {
            const snippet = this.getCodeSnippet();
            if (snippet) {
                result += '\n\n' + snippet;
            }
        }
        // Add suggestion AFTER code snippet (don't interfere with parsing)
        if (this.suggestion) {
            result += this.suggestion;
        }
        return result;
    }
    getCodeSnippet() {
        if (!this.source)
            return '';
        const lines = this.source.split('\n');
        const lineIndex = this.line - 1;
        // Show 3 lines before and after for better context
        const contextLines = 3;
        const startLine = Math.max(0, lineIndex - contextLines);
        const endLine = Math.min(lines.length - 1, lineIndex + contextLines);
        let snippet = '';
        for (let i = startLine; i <= endLine; i++) {
            const lineNum = i + 1;
            const isErrorLine = i === lineIndex;
            const prefix = isErrorLine ? '>' : ' ';
            // Line number with padding
            const lineNumStr = String(lineNum).padStart(5, ' ');
            snippet += `${prefix} ${lineNumStr} | ${lines[i]}\n`;
            // Add pointer to error column with better highlighting
            if (isErrorLine) {
                const spaces = ' '.repeat(this.column + 8);
                const carets = '^'.repeat(Math.min(lines[i].length - this.column + 1, 20));
                snippet += `${spaces}${carets}\n`;
            }
        }
        return snippet;
    }
}
// Common error factories
export function unclosedError(type, name, line, column, source, filename) {
    return new JQHTMLParseError(`Unclosed ${type}: ${name}`, line, column, source, filename);
}
export function mismatchedTagError(opening, closing, line, column, source, filename) {
    return new JQHTMLParseError(`Mismatched tags: expected </${opening}>, found </${closing}>`, line, column, source, filename);
}
export function syntaxError(message, line, column, source, filename) {
    return new JQHTMLParseError(`Syntax error: ${message}`, line, column, source, filename);
}
// Helpful suggestions for common mistakes
export function getSuggestion(error) {
    if (error.includes('Unclosed if statement')) {
        return '\nDid you forget the closing <% } %>?';
    }
    if (error.includes('Unclosed for statement')) {
        return '\nDid you forget the closing <% } %>?';
    }
    if (error.includes('Unclosed component definition')) {
        return '\nDid you forget the closing </Define:ComponentName> tag?';
    }
    if (error.includes('Unclosed slot')) {
        return '\nDid you mean to use a self-closing slot? Try <#name /> instead.';
    }
    if (error.includes('Unclosed tag') || error.includes('Unclosed component')) {
        return '\n\nThis element was opened but never closed. Make sure every opening tag has a matching closing tag.\n' +
            'Common causes:\n' +
            '  • Missing closing tag (e.g., forgot </div>)\n' +
            '  • Tag opened in if/for block but closed outside (split tag conditional - not allowed)\n' +
            '  • Mismatched nesting (e.g., <div><span></div></span>)\n\n' +
            'If opened in <% if/for %>, it MUST close in the same block:\n' +
            '  ❌ <% if (x) { %> <div> <% } %> </div>\n' +
            '  ✅ <% if (x) { %> <div>...</div> <% } %>';
    }
    if (error.includes('Expected %>')) {
        return '\nCheck if you have a %> inside a string literal. Escape it or use a different approach.';
    }
    if (error.includes('Mismatched tags')) {
        return '\nCheck that your opening and closing tags match exactly (case-sensitive).';
    }
    if (error.includes('Mixed content not allowed')) {
        return '\nWhen using slots, wrap all content in <#slotname> tags. Use <#default> for the main content.';
    }
    return '';
}
// Error collection for batch reporting
export class ErrorCollector {
    errors = [];
    maxErrors = 10;
    constructor(maxErrors = 10) {
        this.maxErrors = maxErrors;
    }
    add(error) {
        if (this.errors.length < this.maxErrors) {
            this.errors.push(error);
        }
    }
    hasErrors() {
        return this.errors.length > 0;
    }
    getErrors() {
        return this.errors;
    }
    throwIfErrors() {
        if (this.errors.length === 0)
            return;
        if (this.errors.length === 1) {
            throw this.errors[0];
        }
        // Multiple errors - create a combined message
        let message = `Found ${this.errors.length} errors:\n\n`;
        this.errors.forEach((error, index) => {
            message += `Error ${index + 1}: ${error.message}\n`;
            if (index < this.errors.length - 1) {
                message += '\n';
            }
        });
        throw new Error(message);
    }
}
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